Self-locking winches, rack jacks, and reducers require no brakes. Ideal for work in locations without power! Lightweight and compact with multiple applications!
We have developed numerous applied products featuring a unique load-holding function with a deceleration mechanism (shoji-lock), which have been well received by our customers. <Features of shoji-lock products> - When rotation is applied from the input side, the output side decelerates and transmits power, but rotation is not possible from the output side = self-locking function. This means that no brake is needed, and the load can be held at the desired position. - Compared to worm gear reducers with the same self-locking function, it is highly efficient. Additionally, while the worm has input and output axes that are orthogonal, our design has the input and output shafts aligned in a straight line (in-line), making it considerably more compact and space-saving, as well as lightweight. - Unlike ratchets or one-way clutches, it can hold the load at any position when motion is stopped, regardless of the direction of rotation. Furthermore, there is no ratchet noise, making it suitable for use in quiet environments. - It has a basic sealed structure (IP65) and is maintenance-free. - We offer a variety of applied products, including gear reducers that utilize this self-locking mechanism, winches, and linear actuators (rack jacks). - Stainless steel versions are also available for each model, suitable for cleanroom applications. *For more details, please feel free to contact us.
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basic information
<Inline Reducer = S Reducer> - Higher efficiency compared to worm reducers - Significantly more compact design and lightweight compared to large worm gears - Lineup of manual models supporting SRM 5 to 100 kgm - Lineup of electric models supporting SRE 3 to 50 kgm <Winch = S Winch> - Load is wound up with a handle, and the load is held when the handle is released - Unlike a ratchet, it can hold position in both forward and reverse rotation - Available in a type that can be driven by commercially available electric tools (drill drivers) - Lineup of manual models supporting SWM load 50 to 100 kg - Lineup of electric (tool) models supporting SWE load 50 to 300 kg <Rack Jack = S Linear Actuator> - Raises and holds the load when the round rack rod is lifted - Additional guide rods can be added in case buckling is a concern - Lineup of manual models supporting SLM load 50 to 400 kg - Lineup of electric models supporting SLE load 100 to 400 kg - Available in a type that can connect two units for simultaneous drive (without an intermediate shaft) for some models
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Applications/Examples of results
Achievements / Semiconductor-related, vacuum equipment manufacturers, food machinery, automotive factories, plant-related, various machinery manufacturers (mixing and powder), furnace-related, nuclear power generation-related, etc. "shoji-lock" that stops movement An absolute stop that holds the load at the desired position We assist with this fundamental action of not only transmitting power but also wanting to hold the load. On land... automotive manufacturing lines, solar panel manufacturing lines, nuclear power plants At sea... ship steering control panel opening and closing, underwater survey lifting, yakatabune roof raising and lowering In the air... for maritime rescue, power line repair work, high-rise building cleaning gondolas It is adopted in various situations for various applications. Ideal for disaster situations without power, explosion-proof measures, and energy-saving measures. In particular, in the semiconductor sector, many stainless steel and aluminum products designed for clean rooms are adopted. For more details, please refer to the case studies and our website.
Detailed information
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SLW Series SLW for 100 kg: A specification that combines our winch and rack jack. The rack rod rises and falls by 11.5 mm per rotation, and of course, it holds the load even when the operation is stopped. Compact and versatile! A version for 300 kg is also available.
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SRM series As shown in the image, it is used in tilting and reversing devices. It holds the load when tilted (self-locking) and is very compact, which has received positive feedback.
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Special Product Case 1 We handle a large number of all-stainless steel products designed for clean rooms, such as those used in semiconductors, medical devices, and food machinery, as well as in marine and oceanic fields. The photo shows an electric tool winch installed inside a seabed survey buoy. The input shaft is hexagonal, allowing it to be driven with commercially available sockets. By attaching a dedicated manual speed increaser on the opposite side of the input shaft, it becomes a hybrid type that can be quickly wound manually.
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Case Study 2 of Special Products Even with inexpensive induction motors, there are many cases where they can self-lock without the need for brakes, or are used in combination with brake-equipped motors for double safety. The photo shows an aluminum construction (A7075, black anodized) for weight reduction and rust prevention.
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Special Product Case 3 Achievements of a semiconductor equipment manufacturer. An all-aluminum (A7075) design is also possible, where a belt is used to lift the load instead of a wire, as shown in the photo.
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Special Product Case 4 Medical-related achievements. This type uses fine strings to lift loads instead of wires. The photo shows a steel product treated with electroless nickel, which can be finished more cheaply than all stainless steel or aluminum.
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Special Product Case 5 Our lineup includes the SRM-005-11, a compact inline reducer made entirely of stainless steel. The input and output shafts are neither orthogonal nor offset; they are aligned in a straight line, yet it self-locks, making it very compact. It is particularly suitable for tilting devices and similar applications.
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Special Product Example 6 We have added guide rods to our lineup SLM-050-4.0 small rack jack, creating a twin shaft to address issues such as buckling. As shown in the photo, it is also possible to attach and manufacture flanges at both ends. Please compare it to a cigarette. It is very compact.
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Special Product Case 7 The SLM-D type responds to the request to "raise and lower two rack rods simultaneously" in the SLM series. By connecting two rack jacks with a connecting pipe, it is possible to synchronize the two rack rods. Of course, it comes with a load-holding function and allows for a quite compact design.
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Company information
The load-holding function equipped reduction mechanism (shoji-lock) has been developing applied products such as winches and rack jacks since the early 2000s. Steady sales activities have borne fruit, and it has begun to be adopted for various applications. Unlike conventional worm reduction gears with self-locking functions where the input and output shafts are orthogonal, this mechanism has them aligned in a straight line (inline), allowing for a compact design and space-saving, which has received high praise, resulting in a diverse range of practical examples. (Patents have been obtained in Japan, the United States, the EU (Germany, France, the UK), China, South Korea, and Taiwan.) Furthermore, starting in April 2023, we launched a new business for overseas parts procurement, beginning with Vietnam. Currently, a majority of our parts are also procured overseas, and we hope to leverage our achievements and network to assist companies struggling with cost reduction in parts procurement.